With 20 minutes remaining, Barbosa worked lapped traffic to perfection and drove his No. 9 Action Express Corvette DP past Gurney's No. 99 Gainsco Auto Insurance Corvette DP on the inside of turn seven to take the lead. Barbosa then spent the final moments of the race with Gurney in his mirrors, keeping him at bay to win by 0.238 second.

Barbosa and Law combined to lead 33 laps of the 182-lap race around the 3.4-mile Watkins Glen International Circuit. It was their first victory since the Chevrolet Grand-Am Detroit 200 on June 2.

“Obviously, I was able to use the traffic a little bit to my advantage,” Barbosa said. “That was enough to be close enough to do the move for the lead and it worked out really, really good.”

The No. 9 Action Express Racing team leads the NAEC points standings for the $100,000 by two points, 28-26, over the No. 8 Starworks Motorsport team. The championship will be awarded following the inaugural Brickyard Grand Prix at Indianapolis Motor Speedway on July 27.

Gurney and co-driver Jon Fogarty matched their best result of the season with a second-place performance. They also finished second at Barber Motorsports Park in April.

Third went to Ryan Dalziel, Enzo Potolicchio and Sébastien Bourdais in the No. 8 Starworks Motorsport Ford/Riley. Dalziel and Potolicchio trail Daytona Prototype points co-leaders Scott Pruett and Memo Rojas by three points, 233-230, in the season-long championship. Pruett and Rojas finished fourth.

The GT race saw eight different cars lead the race, but the No. 57 Stevenson Auto Group Chevrolet Camaro GT.R shared by Liddell and Edwards was a fixture inside the top three virtually throughout the six hours. Liddell took the lead for good when Leh Keen brought the class-leading No. 59 the Brumos Companies Porsche GT3 to pit lane for the final time on lap 157.

“Robin ended up crossing the line with half a gallon of fuel left in the tank,” Edwards said. “We were extremely nervous as Robin did that last lap. I don't think I've ever been that nervous in my life. I knew Robin wasn't going to make a mistake, so I figured we were either going to win or run out of fuel and be stuck on the last of the lead lap. Fortunately, half a gallon stayed in the tank and we were able to come away with the win.”

The No. 57 Stevenson Motorsports team parlayed its victory into the NAEC GT points lead by five, 29-24, over the No. 44 Magnus Racing team, which won the season-opening Rolex 24 at Daytona but retired from the Sahlen's Six Hours of the Glen in the first hour with electrical problems.